#include <bits/stdc++.h>
#include <string.h>
#define rep(i,n) for(int i = 0; i < n; i++)
#define srep(i,a,b) for(int i = a; i < b; i++)
#define all(A) (A).begin(),A.end()
#define MOD 1000000007
using namespace std;
using ll = long long;
using P = pair<int,int>;
using Graph = vector<vector<int>>;

int main(void){
	int n,q; cin >> n >> q;
	vector<int> L(n,0);
	int on = 0;
	rep(i,q){
		int l,r; cin >> l >> r;
		l--; r--;
		rep(i,r-l+1){
			if(L[i+l] == '1'){
				L[i+l] = '0';
				on--;
			} else {
				L[i+l] = '1';
				on++;
			}
		}
		cout << on << endl;
	}
}